RALEIGH – Wake County sheriff's deputies has arrested four teenagers for murder in connection with a body found in a mobile home near New Hill Tuesday night.

Authorities made the discovery near Olive Branch Lane and Old U.S. Highway 1 near the Chatham County line. Wake County Sheriff Harrison said deputies are treating the area as a crime scene.

Harrison said Drew Shaw, 16, Ryan Hare, 18, Allegra Dahlquist, 17, and Aadil Kahn, 17, were arrested Tuesday night. Shaw, Hare and Kahn are from Apex and Dahlquist is from Cary.

The home where the body was found, located at 4221 Olive Branch Lane, is owned by Dahlquist's parents, according to Wake County tax records.

Although Wake County Sheriff Donnie Harrison said his office has not yet identified the body, deputies are looking into the possibility that the case is related to the disappearance of 18-year-old Matthew Silliman, who went missing just before Thanksgiving.

On Nov. 26, the N.C. Center for Missing Persons issued a Silver Alert for Silliman, who is believed to suffer from a form of cognitive impairment.

Silliman's profile on the social networking site Facebook shows he is friends with the four teenagers.

Sheriff's deputies and Apex Police went to his parent's home to let them know there is a murder investigation under way, although they do not know whether it is related at this time.

But Harrison said it's too early to tell whether the two cases are related.

"We're working very closely with Apex, they're working closely with us. It's a possibility. We're looking at it. But I'm not going to say yes, I'm not going to say no, because honestly, I don't know," Harrison said.

Investigators will stay on the scene throughout the night. The body was transported to the State Medical Examiner's Office.

Dickey Miller lives down the street from the Dahlquist property where the body was found. He said he finds it hard to believe that the teenagers he knows could be charged with murder.

"They keep a horse trailer that Allegra comes and picks up and takes riding lessons once, twice, three times a week," Miller said. "She stops and talks to me. She's a really sweet girl, a very pretty girl."

Miller said he hasn't noticed anything out of the ordinary when Dahlquist and her friends would hang out at the mobile home. But he did tell investigators about hearing a gunshot last week around 11 p.m.

"It was really close and really loud," he said. "I wrote it off because we're out here in the country."

Investigators wouldn't say if the gunshot was related to this crime.

Dahlquist and Kahn are seniors at Apex High School. Hare dropped out of Panther Creek High School in February and Shaw is a sophomore at Panther Creek.

Apex High senior Bianka Larouche said she knew some of the teens who were charged. She said she was shocked to hear about the arrests.

She said Dahlquist was “always quiet, but always down-to-earth – Nothing out of the ordinary, really nice girl.”

But she said Kahn seemed “really strange,” and Hare was “a little out of the ordinary.”

“Aadil [Kahn] and Ryan [Hare] were also those quiet kids who everyone expected to get into trouble and do something they weren’t supposed to, but something like murder, that really surprises me,” Larouche said.

Other students said they feel bad about what the teens are going through.

“You think of their families,” Apex High School junior Justin Poliachik said. “Their families will be hurting. Even if it doesn’t affect you directly, it’s just sad to hear.”

The teens will first appear in court on murder charges Thursday at 2 p.m.

4 teens charged